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The frequency of required biomonitoring tests is specified in the NPDES
permit. Some facilities are required to test their effluent only annually.
Others may be required to test twice a year, while others may be required to test
quarterly, or even more often.
Upon completion of a test, the results are reported by the testing laboratory.
Although there is no particular specified format for these reports, a biomonitoring
report should include the following details.
 | General Information
 | Permit number |
| Toxicity testing requirements of the permit |
| Facility location |
| Name of the testing laboratory |
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| Source of Effluent and Dilution Water
| Sampling points |
| Collection dates and times |
| Sample collection method (i.e. grab sample or composite sample) |
| Physical and chemical data |
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| Test Details
| Type of biomonitoring test and treatments tested |
| Date and time test started and ended |
| Type and volume of test chambers |
| Number of replicate chambers used with each treatment |
| Number of organisms tested in each chamber |
| Test temperature |
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| Test Organisms
| Scientific name |
| Age and source of test organisms |
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| Quality Assurance Details
| Date and time of most recent reference toxicant test |
| Reference toxicant used |
| Results of reference toxicant test |
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| Biomonitoring Test Results
| Raw data sheets showing daily records of survival and water quality information |
| Tables showing required endpoints for the test (e.g. LC50, NOEC, LOEC etc.) |
| Statistical Methods used to calculate endpoints |
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| Agency Forms |
Agency forms are pre-printed forms which are usually supplied with the permit.
When a test is completed, the agency forms are filled in with the tabulated results
of the test, and are submitted along with the biomonitoring report to the regulatory
agency.
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page last updated: 07/29/99
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